//
//  UIImage+Decode.swift
//  Kingfisher
//
//  Created by Wei Wang on 15/4/7.
//
//  Copyright (c) 2015 Wei Wang <onevcat@gmail.com>
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.

import Foundation

extension UIImage {
    func kf_decodedImage() -> UIImage? {
        let imageRef = self.CGImage
        let colorSpace = CGColorSpaceCreateDeviceRGB()
        let bitmapInfo = CGBitmapInfo(CGImageAlphaInfo.PremultipliedLast.rawValue)
        let context = CGBitmapContextCreate(nil, CGImageGetWidth(imageRef), CGImageGetHeight(imageRef), 8, 0, colorSpace, bitmapInfo)
        if let context = context {
            let rect = CGRectMake(0, 0, CGFloat(CGImageGetWidth(imageRef)), CGFloat(CGImageGetHeight(imageRef)))
            CGContextDrawImage(context, rect, imageRef)
            let decompressedImageRef = CGBitmapContextCreateImage(context)
            return UIImage(CGImage: decompressedImageRef)
        } else {
            return nil
        }
    }
}